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12311857 is a prime number
BaseRepresentation
bin101110111101…
…110100110001
3212011111200201
4232331310301
511122434412
61115515201
7206435425
oct56756461
925144621
1012311857
116a4a098
124158b01
132720c2c
1418c6b85
151132e57
hexbbdd31

12311857 has 2 divisors, whose sum is σ = 12311858. Its totient is φ = 12311856.

The previous prime is 12311851. The next prime is 12311869. The reversal of 12311857 is 75811321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7834401 + 4477456 = 2799^2 + 2116^2 .

It is a cyclic number.

It is not a de Polignac number, because 12311857 - 27 = 12311729 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155928 + 6155929.

It is an arithmetic number, because the mean of its divisors is an integer number (6155929).

Almost surely, 212311857 is an apocalyptic number.

It is an amenable number.

12311857 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311857 is an equidigital number, since it uses as much as digits as its factorization.

12311857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 12311857 is about 3508.8255870020. The cubic root of 12311857 is about 230.9091738906.

The spelling of 12311857 in words is "twelve million, three hundred eleven thousand, eight hundred fifty-seven".